src/HOL/ex/String.ML
author paulson
Mon, 27 Apr 1998 13:47:46 +0200
changeset 4829 aa5ea943f8e3
parent 2031 03a843f0f447
child 5069 3ea049f7979d
permissions -rw-r--r--
New proof of apply_equality and new thm Pi_image_cons
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goal String.thy "hd(''ABCD'') = CHR ''A''";
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by (Simp_tac 1);
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result();
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goal String.thy "hd(''ABCD'') ~= CHR ''B''";
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by (Simp_tac 1);
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result();
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goal String.thy "''ABCD'' ~= ''ABCX''";
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by (Simp_tac 1);
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result();
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goal String.thy "''ABCD'' = ''ABCD''";
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by (Simp_tac 1);
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result();
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goal String.thy
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  "''ABCDEFGHIJKLMNOPQRSTUVWXYZ'' ~= ''ABCDEFGHIJKLMNOPQRSTUVWXY''";
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by (Simp_tac 1);
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result();